连云港港旗台作业区及防波堤工程前后水体交换能力研究

Water exchange capacity before and after construction of Qitai operation area and breakwater project of Lianyungang port

随着旗台作业区及南北防波堤工程的建成,连云港港主港区已经变成为南北短、纵深长的半封闭的狭窄港域,口门的缩窄以及口门至港池末端纵深进一步增加,势必对港内水体的交换能力带来一定的影响。通过三维数学模型对工程前后的水体交换能力进行模拟,分析水体交换能力变化的原因,并通过港内水质点的Lagrange运动轨迹进一步认识港内水体的交换过程。模拟结果表明,港区内受水流动力及港口形态的影响,旗台作业及防波堤工程建设后主港区的半交换周期从约5 d增加至22 d。为了保障港内水域的水质环境,必须严格控制港内水体污染排放。

： With the completion of the Qitai operation area and the auxiliary breakwater project, Lianyungang port has become a long narrow semi-enclosed harbor region. As the entrance of the port becomes narrow and the distance from the entrance to port ends increases, the exchange capacity of the harbor water will certainly be affected. In this article, the water exchange capacity before and after the engineering is studied using a three- dimensional mathematical model and further understanding of the exchange process in the harbor waters is carried out by Lagrange trajectory method. The simulation results indicates that under the impacts of flow dynamics and the port shape, the half exchange period increases from about 5 days to 22 days after the construction of Qitai operation area and the auxiliary breakwater project. In order to guarantee the water quality in the port, the amounts of wastewater discharged into the port must be controlled strictly.